The Mental Health Act (1983, amended 2007) is the main legislation for detaining, assessing, and treating people with mental health disorders without consent in England and Wales.
Voluntary vs Detained Patients
Voluntary patients agree to admission and treatment.
Detained (“sectioned”) patients are treated without consent under the Mental Health Act when there is:
- Risk to themselves or others
- Urgent need for assessment or treatment
Key Updates from the 2007 Amendments
| Area | 2007 Update |
| Definition | Single broad definition of mental disorder. |
| Detention criteria | “Appropriate medical treatment” must be available. |
| Professional roles | Expanded — not just doctors and ASWs (Approved Mental Health Professionals now). |
| Nearest Relative | Can be challenged or displaced by patient or court. |
| Supervised Community Treatment (SCT) | Section 17A introduced — allows conditional discharge with recall option. |
| ECT safeguards | New rules around consent and capacity. |
| Tribunals | Shorter timescales for hospital managers’ referrals. |
| Advocacy | Right to access an Independent Mental Health Advocate (IMHA). |
| Under 18s | Must be placed in age-appropriate hospital settings. |
Important Sections You Need to Know
| Section | Purpose | Key Details |
| Section 2 | Assessment | Detain for up to 28 days. Needs 2 doctors + AMHP. |
| Section 3 | Treatment | Detain for up to 6 months (renewable). Needs 2 doctors + AMHP. |
| Section 4 | Emergency Assessment | Detain for up to 72 hours. 1 doctor + AMHP or nearest relative. Converts to Section 2 if needed. |
| Section 5(2) | Doctor’s holding power | Detain informal inpatient for up to 72 hours for MHA assessment. |
| Section 5(4) | Nurse’s holding power | Detain informal inpatient for up to 6 hours until doctor assesses. |
| Section 7/8 | Guardianship | Community-based control over residence, access to treatment. |
| Section 17A | Supervised Community Treatment | Conditional discharge into the community with recall power. |
| Section 136 | Police power | Remove from public place to place of safety for mental health assessment. Max 24 hours (reduced from 72 hours in 2017). |
Key Safeguards Under the Act
Independent Mental Health Advocacy (IMHA):
- All patients detained under the MHA (or under a community treatment order) have a legal right to access an Independent Mental Health Advocate.
- The IMHA supports patients in understanding their rights and in participating fully in decisions about their care and treatment.
Right to Appeal to a Mental Health Tribunal:
- Patients can appeal against their detention to a First-tier Tribunal (Mental Health).
- The Tribunal is independent and has the power to discharge the patient if detention criteria are not met.
Right to Have Nearest Relative Informed:
- The patient’s nearest relative must be notified when detention under the MHA occurs.
- The nearest relative has certain rights, such as requesting discharge and objecting to detention under Section 3.
Hospital Managers and Care Quality Commission (CQC) Oversight:
- Hospital managers must review detention decisions and can discharge a detained patient independently of medical staff.
- The CQC has powers to inspect mental health services, ensure the rights of detained patients are protected, and investigate complaints.
Special Safeguards for ECT and Treatment Without Consent:
- Patients who have capacity must consent to Electroconvulsive Therapy (ECT).
- If the patient lacks capacity, ECT requires authorisation by a Second Opinion Appointed Doctor (SOAD).
- Specific safeguards also exist for other major treatments (like long-term medication for mental disorder beyond 3 months).
Key Exam Tips
Section 2 = Assessment ➔ 28 days max
Section 3 = Treatment ➔ 6 months renewable
Section 4 = Emergency ➔ 72 hours, fast-tracked to Section 2 if needed
Section 5(2) = Doctor holds ➔ 72 hours
Section 5(4) = Nurse holds ➔ 6 hours
Section 136 = Police hold ➔ 24 hours max
SCT (Section 17A) allows conditional discharge with easy recall
Age-appropriate setting required for under-18s
IMHA must be offered for all detained patients
“Appropriate medical treatment” must be available for detention to occur
References
Mental Health Act 1983 (amended 2007)
Mind (UK Mental Health Charity)
Disclaimer
This post is intended for educational purposes only. It summarises information from publicly available sources, including UK legislation and recognised clinical guidance. It does not constitute legal advice or clinical protocol.
Every effort has been made to ensure accuracy at the time of writing; users should refer to official guidelines and primary legislation for detailed requirements.
Thank you to the joint editorial team of MRCGP Exam Prep for this exam tips post.
